HTC Desire:

* Similar screen size OK
* Pull out keyboard (NO VIRTUAL!) (Desire Z OK)
* USB host FAIL
* Open OS OK (GUI is not open but that is also not for the Maemo GUI)
* Wifi, bluetooth, etc. OK
* Easy Debian (for Open Office) FAIL
* Moderate, affordable price
* Slots for expanding memory OK
* Capable of running various OSes (with or without flashing) FAIL

iPhone 4 / iPad / iPod Touch 4G

* Similar screen size OK (iPad FAIL)
* Pull out keyboard (NO VIRTUAL!) FAIL
* USB host FAIL
* Open OS OK when jailbroken (FreeBSD, basis for iOS 4 is open, but GUI is not open but that is also not for the Maemo GUI)
* Wifi, bluetooth, etc. OK when jailbroken )
* Easy Debian (for Open Office) FAIL
* Moderate, affordable price FAIL for iPhone OK for others
* Slots for expanding memory FAIL, OK for iPad + camera connection kit + jailbreak)
* Capable of running various OSes (with or without flashing) OK for iPhone running Android